33926 Datasheet, PDF (1/24 Pages) Freescale Semiconductor, Inc – 5.0 A Throttle Control H-Bridge

Freescale Semiconductor
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Document Number: MC33926
Rev. 4.0, 12/2006
5.0 A Throttle Control H-Bridge
The 33926 is a monolithic H-Bridge Power IC designed primarily
for automotive electronic throttle control, but is applicable to any low-
voltage DC servo motor control application within the current and
voltage limits stated in this specification.
The 33926 is able to control inductive loads with currents up to
5.0 A peak. RMS current capability is subject to the degree of
heatsinking provided to the device package. Internal peak-current
limiting (regulation) is activated at load currents above 6.5 A ± 1.5 A.
Output loads can be pulse width modulated (PWM-ed) at frequencies
up to 20 kHz. A load current feedback feature provides a proportional
(0.24% of the load current) current output suitable for monitoring by a
microcontroller’s A/D input. A Status Flag output reports
undervoltage, overcurrent, and overtemperature fault conditions.
33926
AUTOMOTIVE THROTTLE H-BRIDGE
ACTUATOR/ MOTOR EXCITER
Two independent inputs provide polarity control of two half-bridge
totem-pole outputs. Two independent disable inputs are provided to
force the H-Bridge outputs to tri-state (high impedance off-state). An
input invert input changes the IN1 and IN2 inputs to LOW = true logic.
Features
Bo_St_Cto_Am_LE V_2:i₁ew
PNB SUFFIX
98ARL10579D
32-PIN PQFN
• 8.0 V to 28 V Continuous Operation (Transient Operation from
5.0 V to 36 V)
• 225 mΩ maximum R_DS(ON) @ 150°C (each H-Bridge MOSFET)
• 3.0 V and 5.0 V TTL / CMOS Logic Compatible Inputs
• Overcurrent Limiting (Regulation) via Internal Constant-Off-
Time PWM
• Output Short Circuit Protection (Short to VPWR or Ground)
ORDERING INFORMATION
Device
PC33926PNB/R2
Temperature
Range (T_A)
- 40°C to 125°C
Package
32 PQFN
• Temperature-Dependant Current-Limit Threshold Reduction
• All Inputs have an Internal Source/Sink to Define the Default (Floating Input) States
• Sleep Mode with Current Draw < 50 µA (with Inputs Floating or Set to Match Default Logic States)
V_DD
V_PWR
MCU
33926
SF
VPWR
FB
CCP
IN1
OUT1
IN2
INV
SLEW
D1
OUT2
D2
PGND
EN
AGND
MOTOR
Figure 1. 33926 Simplified Application Diagram
*This document contains certain information on a product under development. Free-
scale reserves the right to change or discontinue this product without notice
© Freescale Semiconductor, Inc., 2007. All rights reserved.